feat(sdlc): 四階段收尾一律回報

What：新增 tools/stage-report.sh 與 references/stage-report.md，四支階段技能各加一步收尾回報：模型能力標籤判定、工作日誌連結、所有寫入的 wiki 連結；實作階段再加工作目錄與來源、工作、目標三條分支。

Why：階段跑完該交代什麼是固定的，寫在內文靠模型自己記，少一項看不出來。沒寫工作日誌更是如此——內容只留在對話裡，換一個工作階段就沒了。

How：彙整搬到程式層。頁名換絕對網址、commit 數與推送狀態由 git 現查、來源分支在不在遠端也由腳本判定；模型閘門那一列只轉述 sdlc-gate.sh report，不自評。沒有工作日誌就警告使用者檢查，並把內容交給 jsc-log 的暫存區，下次寫日誌一併寫入。結束碼 1 是警告不是阻擋，提前停下來也要回報。

Who：跑 SDLC 四階段的人，以及接手看紀錄的人。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

skills/maintain/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: maintain
-description: SDLC maintenance stage. Gate on capability tags enforced in code by sdlc-gate (maintenance requires no specific tag, but the actual model id must be determinable from the transcript), read projects still inside their maintenance window from MAINTAIN_CONTENTS, then run one sub agent per project: switch to develop or master, propose at least five maintenance actions, commit to a new branch, push, and PR. Update the last-maintained timestamp afterward. Use for periodic upkeep of delivered projects inside their maintenance window; not for projects still mid-implementation or not yet registered in MAINTAIN_CONTENTS.
+description: SDLC maintenance stage. Gate on capability tags enforced in code by sdlc-gate (maintenance requires no specific tag, but the actual model id must be determinable from the transcript), read projects still inside their maintenance window from MAINTAIN_CONTENTS, then run one sub agent per project: switch to develop or master, propose at least five maintenance actions, commit to a new branch, push, and PR. Update the last-maintained timestamp afterward, then close with tools/stage-report.sh - model tag verdict, worklog link, every wiki link written. Use for periodic upkeep of delivered projects inside their maintenance window; not for projects still mid-implementation or not yet registered in MAINTAIN_CONTENTS.
 ---
 
 # maintain
@@ -26,3 +26,4 @@ All wiki reads and writes go through `jsc-gitea:wiki`.
    3. Commit the changes to a new branch per `jsc-git:commit`, push, then open a PR per `jsc-git:pr` back to the branch of step 3.1, passing it explicitly as the base. Completion condition: the PR exists, and you have reported its URL and number.
    4. Update the project's last-maintained field (the zh-TW column 「前次維護時間」) in `MAINTAIN_CONTENTS` to today. Completion condition: `MAINTAIN_CONTENTS` shows today's date in 「前次維護時間」 for that project, saved on the wiki.
 4. The main agent reports the summary: maintenance methods applied per project, PR links, and failure reasons. The report and all generated wiki content, commits, and PR descriptions stay Traditional Chinese per the STE100 rule. Completion condition: the summary names every project read in step 2, each with its applied methods and either a PR link or the reason it was skipped.
+5. **Stage report — the last thing this stage does, including when no project was in window.** Run `tools/stage-report.sh maintain` with one `--page MAINTAIN:{page}` per wiki page this run wrote (`MAINTAIN_CONTENTS` counts), plus `--worklog` and `--worklog-heading` when a work log entry exists. No work log yet: write this stage's log content to a file and pass `--pending-file {file} --log-hash {HASH}` so it is held for the next `jsc-log:worklog` run. Rules and exit codes: `references/stage-report.md`. Exit 1 is a warning, never a block. Completion condition: the script's output is reported to the user verbatim, and every wiki page this run wrote appears in it.